Today is the Octave Day of St. John the Evangelist. It is of simple rite. The liturgical colour is white.
At Mattins the invitatory and hymn are as on the feast but the psalmody is ferial. In the nocturn the first and second lessons are from the Epistle to the Romans, the third lesson is proper to the feast from the writing of St. Augustine on St. John. The Te Deum is sung. At Lauds the psalmody is ferial but the chapter, hymn, antiphon on the Benedictus and collect are as on the feast.
At the Little Hours the psalmody is again ferial, the hymns have the Doxology and melody in honour of the Incarnation. At Prime the lectio brevis is In medio Ecclesiae.
Mass is sung after Sext. The Mass is as on the feast. The Gloria is sung, the second collect is Deus, qui salutis the third collect Ecclesiae. The preface is that of the Apostles. (Rubricarius was fortunate to assist at such a celebration this morning in Greenwich, at a very rubrical altar with two candlesticks). Private Votive and Requiem Masses are forbidden today.
Vespers are of the Octave Day of the Holy Innocents, the liturgical colour is red. The antiphons and psalms are from the ferial Psalter, from the chapter as on the feast.
In the 'liturgical books of 1962' the day is a ferial day of Christmastide. The feast of St. John has lost its Octave. The Doxology or melody of the Incarnation is not sung at the Hours. The Mass is as on January 1st with one collect. Vespers are of the feria. Likewise in the 'Ordinary Form' of the 1962 rite the day becomes a feria of the Christmas season. However, in some countries, like England, the Epiphany was anticipated yesterday and so today becomes a weekday after Epiphany (or the Holy Name following the latest editio typica of the Ordinary Form Missal). Interestingly the 'EF' mess at Spanish Place in London yesterday was of the Epiphany I am informed from an impeccable source.